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  <title>order (Ankoder::CoreExtension::ArrayExtension)</title>
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  <pre><span class="ruby-comment cmt"># File lib/ankoder/ext.rb, line 96</span>
      <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">order</span>(<span class="ruby-identifier">order_str</span>=<span class="ruby-keyword kw">nil</span>)
        <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">self</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">order_str</span>.<span class="ruby-identifier">nil?</span>
        <span class="ruby-identifier">field</span>, <span class="ruby-identifier">sort</span> = <span class="ruby-identifier">order_str</span>.<span class="ruby-identifier">match</span>(<span class="ruby-regexp re">/([a-z0-9_]+)([\s+]*[ASC|DESC]*)/i</span>).<span class="ruby-identifier">to_a</span>[<span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-value">-1</span>]
        <span class="ruby-identifier">sort</span> = <span class="ruby-value str">&quot;ASC&quot;</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">sort</span>.<span class="ruby-identifier">nil?</span> <span class="ruby-keyword kw">or</span> <span class="ruby-identifier">sort</span>.<span class="ruby-identifier">empty?</span>
        <span class="ruby-keyword kw">begin</span>
          <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">sort</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">x</span>,<span class="ruby-identifier">y</span><span class="ruby-operator">|</span>
            <span class="ruby-keyword kw">case</span> <span class="ruby-identifier">sort</span>
            <span class="ruby-keyword kw">when</span> <span class="ruby-regexp re">/ASC/i</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">x</span>.<span class="ruby-identifier">send</span>(<span class="ruby-identifier">field</span>) <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">y</span>.<span class="ruby-identifier">send</span>(<span class="ruby-identifier">field</span>)
            <span class="ruby-keyword kw">when</span> <span class="ruby-regexp re">/DESC/i</span> <span class="ruby-keyword kw">then</span> <span class="ruby-identifier">y</span>.<span class="ruby-identifier">send</span>(<span class="ruby-identifier">field</span>) <span class="ruby-operator">&lt;=&gt;</span> <span class="ruby-identifier">x</span>.<span class="ruby-identifier">send</span>(<span class="ruby-identifier">field</span>)
            <span class="ruby-keyword kw">end</span>
          <span class="ruby-keyword kw">end</span>
        <span class="ruby-keyword kw">rescue</span>
          <span class="ruby-keyword kw">self</span>
        <span class="ruby-keyword kw">end</span>
      <span class="ruby-keyword kw">end</span></pre>
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